github.com/aacfactory/fns@v1.2.86-0.20240310083819-80d667fc0a17/commons/wildcard/wildcard.go (about)

     1  /*
     2   * Copyright 2023 Wang Min Xiang
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   * 	http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   *
    16   */
    17  
    18  package wildcard
    19  
    20  import (
    21  	"bytes"
    22  )
    23  
    24  func Match(pattern []byte, target []byte) (ok bool) {
    25  	ok = New(pattern).Match(target)
    26  	return
    27  }
    28  
    29  func New(pattern []byte) (w *Wildcard) {
    30  	if len(pattern) == 1 && pattern[0] == '*' {
    31  		w = &Wildcard{
    32  			prefix: nil,
    33  			suffix: nil,
    34  		}
    35  		return
    36  	}
    37  	idx := bytes.IndexByte(pattern, '*')
    38  	if idx < 0 {
    39  		w = &Wildcard{
    40  			prefix: pattern,
    41  			suffix: nil,
    42  		}
    43  		return
    44  	}
    45  	w = &Wildcard{
    46  		prefix: pattern[0:idx],
    47  		suffix: pattern[idx+1:],
    48  	}
    49  	return
    50  }
    51  
    52  type Wildcard struct {
    53  	prefix []byte
    54  	suffix []byte
    55  }
    56  
    57  func (w *Wildcard) Match(s []byte) bool {
    58  	if len(w.suffix) == 0 {
    59  		return bytes.Equal(w.prefix, s)
    60  	}
    61  	return len(s) >= len(w.prefix)+len(w.suffix) && bytes.HasPrefix(s, w.prefix) && bytes.HasSuffix(s, w.suffix)
    62  }